The 1st Edition stamp (Edition 1) and the Pokmon's vitals (type, length, weight) ensue, followed by the Trading Card Game information
When those cards are anywhere else (in your hand, your deck, your discard pile, or as your Prize cards), each card is treated as one separate card
10, 2003 While Called by the Grave is today's go-to standard for stopping monster effects from the Graveyard, Dimension Jar tried something similar by preventing them from being revived or being used as banishing fodder when it was first released
(2021-09-24) If you cast Curse of Leeches while it is night, you must still choose a target player, and that player must be a legal target as Curse of Leeches resolves
So collecting multiple of these codes will not give you multiple free entries